首页
登录
职称英语
[originaltext] We all scream for water when thirsty. But do you know that in
[originaltext] We all scream for water when thirsty. But do you know that in
游客
2024-01-31
59
管理
问题
We all scream for water when thirsty. But do you know that in very hot, dry weather, plants also make faint sounds—as if they’re crying out for help? You see, in a plant’s stem, there are hundreds of water pipes that bring water and minerals from the soil all the way up to the leaves. As the ground turns dry, it becomes harder and harder for the plants to do this. In severe droughts, plants have to fight to pull out any water available. Scientist Robert Winter has found out that when it is really bad, their water pipes snap from the tension like rubber bands. When that happens, the whole plant vibrates a little. The snapping pipes make noises ten thousand times quieter than a whisper.
Robert knows that healthy, well-watered plants are quiet. He also knows that many insects prefer attacking dry plants rather than healthy plants. How do the insects know which are healthy plants and which are not? Robert thinks that the insects may listen for the plants that cry, and then they may buzz in to kill. To test his theory, Robert is using a device that can imitate plant cries. He attaches it to a quiet, healthy plant so that the plant sounds thirsty. Then he watches the insects to see if they attack more often than usual. If he is right, scientists could use the insects’ ability against them. They could build traps that imitate crying plants, so that when the insects buzz in to eat, they won’ t buzz out.
Questions 16 to 18 are based on the passage you have just heard.
16. What do plants do when they are thirsty?
17. What plants do many insects tend to attack?
18. What could scientists do if Robert’ s theory proves to be true?
选项
A、Quiet plants.
B、Well-watered plants.
C、Healthy plants.
D、Thirsty plants.
答案
D
解析
信息明示题。短文第二段指出He also knows that many insects prefer attacking dry plants rather than healthy plants.由此可知很多昆虫喜欢攻击处于干旱状态的植物。故选D。
转载请注明原文地址:https://tihaiku.com/zcyy/3411118.html
相关试题推荐
[originaltext]W:Haveyoufoundanythingwrongwithmyteeth?M:Notyet.I’ms
[originaltext]W:Haveyoufoundanythingwrongwithmyteeth?M:Notyet.I’ms
[originaltext]W:Haveyoufoundanythingwrongwithmyteeth?M:Notyet.I’ms
[originaltext]W:Haveyoufoundanythingwrongwithmyteeth?M:Notyet.I’ms
[originaltext]W:Whatisonyourmind,dear?M:Iappliedforajobasalifegu
[originaltext]W:Whatisonyourmind,dear?M:Iappliedforajobasalifegu
[originaltext]W:Iheardyougotfullmarksinthemathexam.Congratulations!
[originaltext]W:Iheardyougotfullmarksinthemathexam.Congratulations!
[originaltext]W:Iheardyougotfullmarksinthemathexam.Congratulations!
[originaltext]W:Iheardyougotfullmarksinthemathexam.Congratulations!
随机试题
按机具设备的价值和使用期划分,机具设备可分为()A.固定资产设备 B.专用机
监理单位在信息系统工程监理过程中针对各类合同的管理须遵循合同管理原则,合同管理原
患儿,10岁,畏寒、高热、乏力,并全身不适。腰痛,有尿路刺激征。尿液检验结果:S
A.恶性高热 B.Ⅱ°房室传导阻滞 C.肺栓塞 D.中度贫血 E.强直性
患儿,女,10岁,突然出现尿频、尿痛,尿检查:尿蛋白(+),红细胞5~7个/HP
_________是教学工作中的中心环节。
按照评价主体的不同,可将教学评价分为( )与外部评价。A.诊断性评价 B.形
在组合风险限额管理中,确定资本分配的权重时,不需要考虑的因素是()。A.
高频阻波器内部的()应完整,连接良好,固定可靠。(A)调谐元件(B)振荡元件
神在全身皆有表现,但却突出地表现于 A.语言 B.动态 C.目光
最新回复
(
0
)